PMID- 35608792 OWN - NLM STAT- MEDLINE DCOM- 20220608 LR - 20220628 IS - 1976-3786 (Electronic) IS - 0253-6269 (Linking) VI - 45 IP - 5 DP - 2022 May TI - Adapalene induces adipose browning through the RARbeta-p38 MAPK-ATF2 pathway. PG - 340-351 LID - 10.1007/s12272-022-01384-4 [doi] AB - Adipose browning has recently been reported to be a novel therapeutic strategy for obesity. Because the retinoic acid receptor (RAR) is a potential target involved in browning, adapalene (AD), an anti-acne agent with RAR agonism, was examined in detail for its effects on adipose browning and the underlying mechanisms in vitro and in vivo. AD upregulated the expression of adipose browning-related markers in a concentration-dependent manner, promoted mitochondrial biogenesis, increased oxygen consumption rates, and lowered lipid droplet sizes in differentiated 3T3/L1 white adipocytes. Among the three retinoic acid receptors (RARalpha, RARbeta, and RARgamma), knockdown of the gene encoding RARbeta mitigated AD-induced adipose browning. Similarly, LE135 (a selective RARbeta antagonist) attenuated AD action, suggesting that AD promotes adipose browning through RARbeta. Sequential phosphorylation of p38 mitogen-activated protein kinase (MAPK) and activating transcription factor 2 (ATF2) was critical for AD-induced adipose browning, based on the observations that either SB203580 (a p38 MAPK inhibitor) or ATF2 siRNA reduced the effects of AD. In vivo browning effects of AD were confirmed in C57BL/6J mice and high-fat diet-induced obese (DIO) mice after oral administration of AD either acutely or chronically. This study identifies new actions of AD as an adipose browning agent and demonstrates that RARbeta activation followed by increased phosphorylation of p38 MAPK and ATF2 appears to be a key mechanism of AD action. CI - (c) 2022. The Pharmaceutical Society of Korea. FAU - Lee, Na Hyun AU - Lee NH AD - Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, 21999, Republic of Korea. FAU - Choi, Mi Jin AU - Choi MJ AD - Department of Pharmacology, Gachon University School of Medicine, Incheon, 21999, Republic of Korea. FAU - Yu, Hana AU - Yu H AD - Department of Pharmacology, Gachon University School of Medicine, Incheon, 21999, Republic of Korea. FAU - Kim, Jea Il AU - Kim JI AD - Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, 21999, Republic of Korea. FAU - Cheon, Hyae Gyeong AU - Cheon HG AD - Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, 21999, Republic of Korea. hgcheon@gachon.ac.kr. AD - Department of Pharmacology, Gachon University School of Medicine, Incheon, 21999, Republic of Korea. hgcheon@gachon.ac.kr. LA - eng GR - 2020R1F1A1048327/Ministry of Education/ PT - Journal Article DEP - 20220524 PL - Korea (South) TA - Arch Pharm Res JT - Archives of pharmacal research JID - 8000036 RN - 0 (Activating Transcription Factor 2) RN - 0 (Atf2 protein, mouse) RN - 0 (Lipid Regulating Agents) RN - 0 (Receptors, Retinoic Acid) RN - 0 (retinoic acid receptor beta) RN - 1L4806J2QF (Adapalene) RN - EC 2.7.11.24 (p38 Mitogen-Activated Protein Kinases) SB - IM MH - 3T3-L1 Cells MH - *Activating Transcription Factor 2/metabolism MH - *Adapalene/administration & dosage/pharmacology MH - *Adipose Tissue, White/drug effects/metabolism MH - Administration, Oral MH - Animals MH - *Lipid Regulating Agents/administration & dosage/pharmacology MH - Mice MH - Mice, Inbred C57BL MH - Phosphorylation MH - *Receptors, Retinoic Acid/metabolism MH - *p38 Mitogen-Activated Protein Kinases/metabolism OTO - NOTNLM OT - Adapalene OT - Adipose browning OT - Obesity OT - Retinoic acid receptor beta EDAT- 2022/05/25 06:00 MHDA- 2022/06/09 06:00 CRDT- 2022/05/24 11:21 PHST- 2021/12/27 00:00 [received] PHST- 2022/05/16 00:00 [accepted] PHST- 2022/05/25 06:00 [pubmed] PHST- 2022/06/09 06:00 [medline] PHST- 2022/05/24 11:21 [entrez] AID - 10.1007/s12272-022-01384-4 [pii] AID - 10.1007/s12272-022-01384-4 [doi] PST - ppublish SO - Arch Pharm Res. 2022 May;45(5):340-351. doi: 10.1007/s12272-022-01384-4. Epub 2022 May 24.